diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h
index 0994aa5..5939166 100644
--- a/src/core/ngx_core.h
+++ b/src/core/ngx_core.h
@@ -85,6 +85,7 @@
 
 #define ngx_abs(value)       (((value) >= 0) ? (value) : - (value))
 #define ngx_max(val1, val2)  ((val1 < val2) ? (val2) : (val1))
+#define ngx_min(val1, val2)  ((val1 > val2) ? (val2) : (val1))
 
 void ngx_cpuinfo(void);